Internal combustion engine with a venturi nozzle disposed in a fluid-carrying component in fluid connection with a tank ventilation line

Abstract

The invention relates to an internal combustion engine having a fuel tank ( 36 ), a tank ventilation line ( 38 ) and a Venturi nozzle ( 30 ) disposed in a fluid-carrying component ( 16 ), wherein the Venturi nozzle ( 30 ) has an inflow channel ( 28 ), an opening point ( 40 ) adjoining downstream of the inflow channel ( 28 ) with a fluid connection to the tank ventilation line ( 38 ), and an outflow channel ( 32 ) adjoining downstream of the opening point ( 40 ). In this case, an outflow section ( 48 ) of the Venturi nozzle downstream of the opening point ( 48 ) is surrounded by the component ( 16 ) in such a manner that a detection space ( 46 ) is formed around the outflow section ( 48 ), wherein the detection space ( 46 ) has at least one inlet opening ( 50 ) via which the detection space ( 46 ) can be pressurized and wherein at least one pressure sensor ( 34 ) for monitoring the pressure in the detection space ( 46 ) is provided.

What is claimed is: 
     
       1. An internal combustion engine comprising:
 a tank ventilation line; 
 a Venturi nozzle disposed in a fluid-carrying component, the Venturi nozzle comprising a first inflow channel, a second inflow channel that is connected to the tank ventilation line, an opening point adjoining downstream of both the first inflow channel and the second inflow channel, and an outflow channel adjoining downstream of the opening point; and 
 an outflow section of the Venturi nozzle, that is downstream of the opening point and leads into an intake hood, is surrounded by the fluid-carrying component such that a detection space is formed around an exterior of the outflow section, 
 wherein the detection space has at least one inlet opening via which the detection space is pressurized, 
 wherein, for pressurizing the detection space, the at least one inlet opening is in fluid connection with a pressure pipe that is downstream of an exhaust gas turbocharger, such that fluid from the pressure pipe that is downstream of the exhaust gas turbocharger flows into the detection space via the at least one inlet opening of the detection space to pressurize the detection space, 
 wherein at least one pressure sensor monitors a pressure in the detection space, and 
 wherein the detection space is sealed off from the outflow section of the outflow channel, such that fluid flowing out of the outflow section flows into the intake hood without entering into the detection space. 
 
     
     
       2. The internal combustion engine according to  claim 1 , wherein the first inflow channel and/or a port to the tank ventilation line are at least partially surrounded by the fluid-carrying component, wherein the port forms the second inflow channel. 
     
     
       3. The internal combustion engine according to  claim 1 , wherein the at least one pressure sensor is arranged in the pressure pipe downstream of the exhaust gas turbocharger. 
     
     
       4. The internal combustion engine according to  claim 1 , wherein the at least one inlet opening into the detection space is formed upstream of or in the first inflow channel of the Venturi nozzle. 
     
     
       5. The internal combustion engine according to  claim 1 , wherein the at least one inlet opening into the detection space is formed flow-parallel to the first inflow channel of the Venturi nozzle. 
     
     
       6. The internal combustion engine according to  claim 1 , wherein a connection piece is provided upstream of the first inflow channel of the Venturi nozzle. 
     
     
       7. The internal combustion engine according to  claim 1 , wherein the Venturi nozzle is formed in several parts. 
     
     
       8. The internal combustion engine according to  claim 1 , wherein the Venturi nozzle and/or the fluid-carrying component is completely or partially made of plastic. 
     
     
       9. The internal combustion engine according to  claim 1 , wherein the internal combustion engine is connectable to a fuel tank. 
     
     
       10. The internal combustion engine according to  claim 1 , wherein the tank ventilation line terminates directly at the opening point of the Venturi nozzle, such that an end section of the tank ventilation line forms the second inflow channel. 
     
     
       11. The internal combustion engine according to  claim 10 , wherein the detection space is sealed off from the tank ventilation line and wherein the outflow channel is contained within the outflow section. 
     
     
       12. The internal combustion engine according to  claim 1 , wherein the opening point is an inlet into the Venturi nozzle. 
     
     
       13. The internal combustion engine according to  claim 1 , wherein the Venturi nozzle is surrounded by the detection space, such that at least a portion of the outflow channel, the tank ventilation line, the opening point and the first inflow channel are disposed in the detection space. 
     
     
       14. The internal combustion engine according to  claim 1 , wherein the at least one inlet opening is a through-hole formed in a side wall of the first inflow channel at a position that is downstream of an inflow opening of the first inflow channel and upstream of the opening point, such that after a fluid flows axially into the first inflow channel via the inflow opening of the first inflow channel, a portion of the fluid flows radially out of the first inflow channel and into the detection space via the through-hole while a remainder of the fluid continues to flow axially through the first inflow channel. 
     
     
       15. The internal combustion engine according to  claim 1 , further comprising a connection piece, the connection piece coaxially surrounding an upstream end portion of the first inflow channel, wherein the at least one inlet opening is provided by a space between an inner surface of the connection piece and an external surface of the upstream end portion of the first inflow channel. 
     
     
       16. The internal combustion engine according to  claim 1 , wherein an entirety of the outflow section is inserted inside the intake hood.